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NumComps

Syntax

NumComps(X:VECTOR or MODULE):INT
    

Summary

the number of components of a vector

Description

If X is a vector, this function returns the number of components of X; it gives the same result as Len(X). If X is a module, then this function returns the rank of the free module in which X is defined.

example

    
Use R ::= Q[x,y];
NumComps(Vector(x,y,x^2+y^2,x^2-y^2));
4
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M := Module([x,y^2,2+x^2y],[x,0,y]);  -- a submodule of R^3 
NumComps(M);
3
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M.NumComps;  -- alternative syntax
3
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See Also